Shuttle-guide block for narrow-ware looms



J. S. MANN SHUTTLE GUIDE BLOCK ,FOR NARROW WARE LooMS Filed Feb. 8. 1,922

Patented Oct. 9, 1923. i

osnrn s. MANN, or wonens'rnn,

NOW ES *LooIvr WORKS, A oonronamron OF MASSACHUSETTS.

"SHUTTLE-GUIDE BLOCK 'FORNARROW-WARE ooms; i

. Ap iieation fil ed February 8, 1922. Serial 535,05 8.

7 To a-ZZ ee /tom it m rtg/concei/ia I Beitknowntha't ;I', JOSEPH S.,MANVN a I citizen of the United; States, residing at lVorcesteujn the county'of Worcester and State of Massachusetts, have invented V a i new fand useful Shuttle-Guide Block for Narroware Looms, of which the following is a specification. v j i r This invention'relates to a narrow ware loom and particularly'to, thelprovision of improved shuttle guide; blocks in such a loom. These guide blocks:proj'ect upward from the lay beam and form supports for the. shut-tlesqvhich are moved rapidly back and forth in arc-shaped grooves in the grooves.

blocks.

' -The grooves in the guide blocks areusually undercut or T-shaped and frequently intersect in such relation that small weak projections are left between adjacent Suitable reinforcement of these projections is desirable and becomes essential in extreme cases.

. The reduction of friction and wear between the shuttle and. the guide block is also very important and for this purpose it has been more or less customary to provide wearing strips of vulcanized fiber along the sides or edges of r the grooves. While this reduces the friction it also materially increases the expense of manufacture.

It is the object of my invention to provide for both reinforcing the weak portions of the guide block and for reducing the friction between the shuttle and the guide block, both without materially increasing the cost of manufacture.-

With this general object 1n view, my71n- VQIIUOH' relates to certam improvements-1n I the constructive"details of a shuttle guide 'dev-eloping these improvements,v

; shown in the drawings, in which portion of v a lay having my improved guide blocks mounted thereon; H V y Y r -Figr2 is a front elevation of one ofthe' block an dalso to a'metliodorprocess of all .of which will be hereinafter described and more particularly pointed out in the appended claims. I A preferred form.;of my invention "Fig. '1 is a front elevation Ora guide blocksj V Fig. 3 is a side elevatlon thereof;

I 4 is aj transverse view taken along the line 4+4; inFig Q; and

1 Fig, 5 in detail sectional vijewtakii along the line 5+5 iniFigl, 4h

" .B ,ferringzto thedrawingsjil h ave'shown if i a. portion of a lay beamlO having shuttle guiding blocks 11 and-12 mounted thereon.

These guideblo'cks are provided with arc-'1 V shaped -gr 0oves"1;3, .which grooves are. u dercut or Tshaped in section, to prevent displacement the shuttlesif In theend guide blocks 11 only groove is requiredbut in the. intermediate guide "blocks lZPiIitersecting g i 13 are p'rovi'ded; asffclearly. shown in Fig. 2. These grooves frequently intersect in MAssAcHUs'ETTs-AssrenoR To onoivrr'ron &"

asin gle I rooves such relation that" small projections 14 are left between adjacent grooves. These proe jections are greatly weakened by the t ndercutting of the groove and reinforcement.

r 76. YR will also be noted in Fig. 4 that the grooves 13 are of such depth that the-guide" thereof frequently becomes essential.

block, as a whole, requires additional reinforceinent wood.

'These parts may be conveniently and economically strengthened by the insertion of a strip 15 extending vertically along a cross-wise of thelgrain of the 'recessin the back of the guide block and by small'angularly disposed strips 16' inserted diagonally across the rear corners of the guide block and extending forward intotheweakened projections 14. 7

Very satisfactory lubrication of my imp-roved shuttle guide block may be secured by impregnating the guide blocks to a limited depth below the surface with parafiine or other suitable materialwhich iscomblocks therein. An important to pm d with h necessary reinforcement; f

In carryingoutthls methodjlgfirstlform- A V are shaped and grooved guide block from a suitable piece :of woodand'then soak'the block inpai afline fora period of about five hours at a' 'temperature of about-240 F; I 1 I thereafter form the slots or recesses toreceive the reinforcing strips 15 and 16; cut

ting these slots or recesses through the impregnated surface layer of the guide block to the untreated material within the block. I thereafter secure the strips and 16 in the slots by the use of glue or other suitable adhesive. 7 q 1 By this method of procedure, I am able to combine the advantages'ofboth lubrication and reinforcement in a single guide block and at a minimum expense.

. tageous result depends largely upon the'part'icular order in which the several steps are carried out, as otherwise the glue retaining the. strips will be loosened by the high temperature of the boiling operation or the walls of the slots or recesses will become im- 20 disclosed otherwise than as set forth in' the a claims. but what I claim is pregnated with parafline so that the strips cannot be made to adhere thereto.

v Having thus described my'invention, I do not wish'to be limited to the details herein 1. The method of forming a shuttle guide block, which comprises shapingand grooving the guideblock, impregnating theouter This advan-' portion of the guide block with a lubricant,

thereafter cutting slots'throughthe impregnated portion to the untreated material within, and adhesively securing a reinforcing strip therein. V V

2. The method of forming a shuttle guide block, which'comprises shaping and grooving the guide block, soaking the guide block in parafline until the block is impregnated therewith to a limited depth below the sur-- thereafter cutting slots through the face,

impregnated outer portion tothevuntreated material within, and adhesive'l'y securing reinforcing strips in said slots.

3. A shuttle guide block comprising a piece of wood grooved to guide a shuttle, said guide block being impregnated with a lubricant to a limited depth below the surface and having slots extending below the impregnated portion, and reinforcing strips adhesively secured in said slots.

In testimony whereof I have hereunto affixed my signature 

